The SRAM Rival E1 DUB power meter crank arm is a modern solution that enhances training progress tracking. It is primarily intended for road cyclists. This crank arm features high accuracy, measuring rider power from the left leg, which is then converted into total power. The manufacturer guarantees an accuracy of +/- 1.5%. Additionally, the device is waterproof (IPX7 rating), ensuring reliable measurements even in harsh weather conditions. Compatibility with Bluetooth and ANT+ wireless connectivity allows very fast and easy synchronization with apps and training devices. The crank arm operates on 1 AAA battery, lasting approximately 400 hours. This model is designed to work with the SRAM DUB bottom bracket.